Answer: I wish I can help you, But I can't
Step-by-step explanation: lll

As we know that :
so, over here
plugging the value of i² as -1
Present value, P = 20
compounding interest per 6 months, i = 0.025/2 = 0.0125
Number of periods, n = 30*2 = 60 (half-years)
Future value in 30 years
=P(1+i)^n
=20(1.0125)^60
= $42.14
The inequality should be

The sign on the right is only a 'smaller than' sign because he spent less than 180.
On the left, assuming that even if Calvin took nobody (poor Calvin), we should assume that he at least went himself, hence he spent a minimum of $12.
1) the graph is attached.
2) ∠A = ∠A; ∠B = ∠B; ∠C = ∠D; AC/BD = AD/BC = AB/AB
3) The rise from A to D is 4.5; the run from D to B is 9; the slope is 4.5/9 = 1/2.
The rise from C to B is 4.5; the run from A to C is 9; the slope is 4.5/9 = 1/2.